Plain · Spring · Durlok

Washers

Plain, spring and Durlok washers to complete every bolt and nut order — in mild steel, hardened steel and stainless steel.

Also calledPlain washerFlat washerSpring washerLock washerDurlok washer

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Overview

About our washers range

Washers spread fastener load, protect the joint surface and help stop loosening. We supply plain washers to DIN 125 / IS 2016, spring washers to DIN 127 / IS 3063, hardened washers for HSFG and high-tensile bolting, and Durlok locking washers for high-vibration joints.

Common sizes we supply: M6, M8, M10, M12, M16, M20 and M24 plain and spring washers.

Also known in the trade as: Plain washer, Flat washer, Spring washer, Lock washer, Durlok washer, Hardened washer, SS washer.

Makes / Suppliers

Available makes

TVS/Sundaram Fasteners

Unbrako

Local Make

Specifications

Technical specifications

Plain Washer: Distributes fastener load evenly and protects the surface — DIN 125, IS 2016
Spring Washer: Adds tension to resist loosening from vibration — DIN 127, IS 3063
Durlok Washer: Wedge-lock washer for secure locking in high-vibration joints
Hardened Washer: Through-hardened for high-tensile and HSFG bolting
Material: Mild steel · Spring steel · Hardened steel · SS 304 / 316

Coatings & Finishes

Finishes available

Black Oxide / Self Colour

Standard heat-treated finish with light oil. Default for high-tensile grades 8.8–12.9.

Zinc Plated – White / Clear

Bright silver electroplate for indoor corrosion protection.

Zinc Plated – Yellow

Yellow-passivated zinc with better salt-spray life than clear zinc.

Hot-Dip Galvanized (HDG)

Thick zinc coating for outdoor, structural, and construction use.

Stainless Steel SS 304 (A2)

Natural finish; general corrosion resistance for food, pharma, and outdoor use.

Stainless Steel SS 316 (A4)

Molybdenum grade for marine, chemical, and coastal environments.

Sizes

Washer size chart

Bolt Size	Plain DIN 125 (ID × OD × T)	Spring DIN 127 (ID × OD × T)
M5	5.3 × 10 × 1.0	5.1 × 9.2 × 1.2
M6	6.4 × 12 × 1.6	6.1 × 11.8 × 1.6
M8	8.4 × 16 × 1.6	8.1 × 14.8 × 2.0
M10	10.5 × 20 × 2.0	10.2 × 18.1 × 2.2
M12	13 × 24 × 2.5	12.2 × 21.1 × 2.5
M16	17 × 30 × 3.0	16.2 × 27.4 × 3.5
M20	21 × 37 × 3.0	20.2 × 33.6 × 4.0
M24	25 × 44 × 4.0	24.5 × 40 × 5.0